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Microfluidics is a multidisciplinary technology with applications in various fields, such as biomedical, energy, chemicals and environment. Thermoplastic is one of the most prominent materials for polymer microfluidics. Properties such as good mechanical rigidity, organic solvent resistivity, acid/base resistivity, and low water absorbance make thermoplastics suitable for various microfluidic applications. However, bonding of thermoplastics has always been challenging because of a wide range of bonding methods and requirements. This review paper summarizes the current bonding processes being practiced for the fabrication of thermoplastic microfluidic devices, and provides a comparison between the different bonding strategies to assist researchers in finding appropriate bonding methods for microfluidic device assembly.
ABSTRACT
BACKGROUND: We provide the first post-approval safety analysis of COVISHIELD in health care workers (HCWs) in northern India. METHODS: This continuing prospective observational study (February 2021 to May 2022) enrolled participants ≥18 years receiving COVISHIELD vaccination. Primary outcome was safety and reactogenicity. Categories (FDA toxicity grading) and outcomes of adverse events following immunization (AEFIs) were recorded, causality assessment performed, and risk factors analysed. FINDINGS: We present the results of an interim analysis of 804 participants. AEFIs following first dose were reported in 321 (40%; systemic involvement in 248). Among 730 participants who completed a 7-day follow-up post second dose, AEFIs occurred in 115 (15.7%; systemic in 99). Majority of AEFIs were mild-moderate and resolved spontaneously. Serious AEFIs, leading to hospitalization was noticed in 1 (0.1%) participant with suspicion of immunization stress related response (ISRR). AEFIs of grade 3 severity (FDA) were recorded in 4 participants (0.5%). No deaths were recorded. Regression analysis showed increased risk of AEFIs in younger individuals, a two times higher odds in females, those with hypertension or with history of allergy; and three times higher odds in individuals with hypothyroidism. INTERPRETATION: COVISHIELD carries an overall favourable safety profile with AEFI rates much less than reported for other adenoviral vaccines. Females, those with hypertension, individuals with history of allergy and hypothyroidism may need watchful vaccine administration. This being an interim analysis and based on healthcare workers who may not reflect the general population demographics, larger inclusive studies are warranted for confirming the findings. FUNDING: No funding support.
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India is a land of spices and medicinal plants. Ayurvedic medications and methods are commonly practised in India for curing several ailments. Lepidium sativum (garden cress) is an important herb that belongs to Brassicaceae family. It is believed that the plant has its origin in Ethiopia but is now cultivated throughout the world. The plant is well-known in Ayurveda for its beneficial properties it holds. The present study describes the fracture healing property of the methanolic and aqueous extract of Lepidium sativum seeds. For the study, 21 Charles foster rats were used. They were grouped into three groups each containing seven rats: control, methanolic, and aqueous group. Rats were anesthetized using ether vapors and fractures were induced in each rat from all the three groups using hand held three-point bending technique. The broken bone fragments were then stabilized using splints. The control group was administered with normal saline, along with food and water, post-fracture. The methanolic group was administered with the methanolic extract of Lepidium sativum seeds at dose of 400 mg/kg given orally, post-fracture along with food and water. The third group received aqueous extract of the seeds in doses of 550 mg/kg orally, along with daily food and water intake for a period of 8 weeks. The results were evaluated both radiologically and biochemically. X-rays were done on day 0, 2nd week, and 4th week post-fractures to look for the callus formation and serum levels for calcium, phosphorus, and alkaline phosphatases were evaluated on 0 day, 1 week, 2nd week, 4th week, 6th week, 8th week, and 10th week post-injury. It was observed at the end of the study period that the methanolic group had significant callus formation starting at the 2nd week itself post-fracture. The serum levels of calcium, phosphorus, and alkaline phosphatases at 4th, 6th, and 8th weeks had significant P values in the methanolic group rats.
ABSTRACT
CONTEXT: WHO in its development of the roadmap on access to medicines and vaccines 2019-2023 has emphasized that the greatest challenge in achieving Universal Health Coverage (UHC) stem from persistent barriers to accessing health services and to accessing affordable and quality assured health products. In this context, WHO introduced the concept of essential medicines in 1977, and since then, this concept, has been revised every 2 years and is accepted by many countries as guideline to develop National Drug Policy. The concept emphasizes that all aspects of drug management, including procurement, storage, distribution, and use, are easier if fewer essential medicines/items must be dealt with. Essential Medicines are those that satisfy the priority healthcare needs of the population. AIMS: During 2017-18, based on the principles of Essential Medicines Concept, we decided to develop and implement "Quality Procurement Management Policies'(QPMP) at Sir Sundar Lal Hospital, at Varanasi. The Pharmaco-econmics and Pharmacovigilance tools are also used to further maximize financial and therapeutic benefits. MATERIALS AND METHODS: This is evidence based, an observational, and retrospective study. Initially, the analysis of current data on sales of antibiotics during November 2017, December 2017, and January 2018, the procurement practices, selection of medicines, and pattern of use was studied and based on these findings reforms were designed and implemented through the Hospital Formulary Committee. RESULTS: This study revealed that- By the application of QPMP, both the Cost and Quality factors of Medication Management can be dealt with very effectively. And it is possible to make available Quality Assured Medicines at most economic prices, resulting in substantial savings. This study has further, shown that the confidence of physicians also improved as quality assured medicines are provided. CONCLUSION: The study at Sir Sundar Lal Hospital is thus worth emulating and shown that a doable roadmap with signposts at each and every turn can be designed and can be effectively implemented so that the goal of UHC can be achieved.
